8d. Presentation

Contract for Concourse N Hazard Mitigation

Item No.        8d_supp
Date of Meeting      May 10, 2022
C800556  NSAT Modernization
Concourse N Arc Flash Mitigation

Purpose & Scope
Purpose:
Supply and install the following equipment and monitoring system for arc flash
mitigation at the south main power center in the concourse:
Project Scope:
Two (2) new appropriately rated arc flash circuit breakers
The modifications to the switchgear to accept the 2 new circuit breakers
Two (2) circuit breaker relays for primary breaker protection
Two (2) control power transformers
Two (2) sets of 3 current transformers for power monitoring
Perform commissioning of the switchgear to validate the arc flash incident levels
desired are achieved

2

North Satellite  Arc Flash Mitigation



3

Schedule
CIP: C800556
Key Schedule Milestones:
Design Start: Q2 2021
Construction Start: Q3 2022
In-Use Date: Q4 2022



4

Risks and Mitigation
Risk: Safety
Mitigation: Ensuring the proper breakers are installed to mitigate the arc flash levels
Risk: Schedule
Mitigation: Maintaining the construction schedule to promote safety





5

Action Requested
Request Commission authorization for the Executive Director to
(1) Use Port of Seattle crews, as well as small and major works on-call
contracts to perform the construction work and;
(2)  advertise and execute a major on-call construction contract for hazard
mitigation in the south power center of Concourse N
The total estimated project cost is $1,000,000
This work is being completed as part of the original North Satellite
Modernization at Concourse N project.
6

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